summary of best practices for exception handling

tmrcp

于 2010-04-29 16:53:17 发布

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本文探讨了Java中异常处理的三种常见情况：编程错误、客户端代码错误及资源故障，并介绍了检查性和非检查性异常的区别。此外，还提供了设计API时的最佳实践建议，包括何时使用检查性异常、保持封装性等；同时也分享了使用异常时的最佳做法，如总是清理资源、避免用异常控制流程等。

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The nature of Exceptions
there are three different situations that cause exceptions to be thrown:
1. Exceptions due to programming errors
2. Exceptions due to client code errors
3. Exceptions due to the resource failures
Types of Exceptions in java
1. Checked Exceptions
2. Unchecked Exceptions
Best Practices for Designing the API
1. When deciding on checked exceptions vs.unchecked excpetions,ask yourself
"what action can client code take when excpetion occurs?"
2. Preserve encapsulation
3. Try not to create new custom exception if they don't have useful information
for client code.
4. Document exceptions
Best practices for using exceptions
1. Always clean up after yourself
2. never use excpetions for flow control
3. Do not suppress or ignore exceptions
4. Do not catch top-level exceptions.
5. Log exceptiions just once

you can refer to the original article of best practices of exception handling at fellowing link
[url]http://onjava.com/pub/a/onjava/2003/11/19/exceptions.html[/url]